Subquery - Study guides, Class notes & Summaries
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Introduction to Relational Databases Challenge 2.3 (WGU)
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Which of the following queries will use a subquery to find the rows in the invoice 
table in the country USA that have the invoice total larger than the average of 
invoices of those in the country Canada? 
 a.) 
 SELECT * FROM invoice 
 WHERE total > 
 (SELECT AVG(total) FROM invoice 
 WHERE billing_country = 'Canada') 
AND billing_country = 'USA'; 
 b.) 
 SELECT * FROM invoice 
 WHERE total > 
 (SELECT AVG(total) FROM invoice 
 WHERE billing_country = 'USA') 
AND billing_...
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CSIT 154 Final Exam || with 100% Error-free Answers.
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The syntax of the DECODE function starts with _____. correct answers DECODE(e, x, y, d) 
 
String manipulation functions are rarely used in programming correct answers False 
 
If a designer wishes to create an inner join, but the two tables do not have a commonly named attribute, he can use a(n) _____ clause. correct answers JOIN ON 
 
An implicit cursor is automatically created in procedural SQL when the SQL statement returns only one value correct answers True 
 
In Oracle, the _____ function...
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WGU C170 Data Management Problem Solving Exam Questions and With Distinction level Marking scheme updated 2024/2025
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WGU C170 Data Management Problem Solving Exam Questions and With Distinction level Marking scheme updated 2024/2025 
 
inner join - correct answer A join operation in which only rows that meet a given criterion are selected. The most common type of join 
 
outer join - correct answer A join operation that produces a table in which all unmatched pairs are retained; unmatched values in the related table are left null 
 
c - correct answer A join operation that returns the Cartesian product of two ...
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CIT 225 Final Exam
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A subquery can return a result set, a column of one or more rows, or a single ______________________. - Answer- cell 
 
In many cases, a subquery can be restated as a/an _____________ - Answer- join 
 
A correlated subquery is a subquery that is executed once for each ______________________ in the outer query. - Answer- row, row processed 
 
When you code a subquery in a FROM clause, it returns a result set that can be referred to as an _____________________________ view. - Answer- inline 
 
If ...
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S307 Final Exam Study Guide with Complete Solutions
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S307 Final Exam Study Guide with Complete Solutions 
join - Correct Answer - relational operation that causes two or more tables with a common domain to be combined into a single table or view 
- can use "JOIN" or "INNER JOIN"..."ON" 
- common columns appear redundantly in the result table 
- can use "=", ">","<" ,"<>" 
 
equi-join - Correct Answer - join in which the joining condition is based on equality between values in the common columns 
 
natural join - Correct A...
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MySQL Final Study Guide - Chapters 1 - 11 Quizes
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SELECT - Answer- You can use the AS keyword with the CREATE TABLE statement to create a copy of a table from a ____________________ statement. 
 
 SELECT 
 DELETE 
 WHERE 
 LIKE 
 
DELETE - Answer- By default, MySQL automatically commits changes to the database immediately after each INSERT, UPDATE, and ______________ statement that you issue. 
 
 ON 
 DELETE 
 AS 
 COMMIT 
 
null - Answer- When you code a column list in an INSERT statement, you can omit columns with default values and col...
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Oracle 1Z0-071 practice test questions fully solved & updated 2024
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ORDER BY 
must be placed at the end of the SQL statements 
 
 
 
When using ORDER BY reference, the column name in force is 
whatever column name exists in the first SELECT statement 
 
 
 
An INDEX object is 
built on one or more columns in a table 
 
 
 
The INDEX stores data from 
its table's columns on which it is built and presorts that data in order to speed future queries 
 
 
 
When the DML statements INSERT, UPDATE, and DELETE are executed on an indexed table 
the indexed data is chang...
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(Answered) CIST 1220 Final Review: CIST 1220 SQL - Gwinnett Technical College.
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(Answered) CIST 1220 Final Review: CIST 1220 SQL - Gwinnett Technical College. 
 
 
WHERE 
You can join tables by using a condition in the ____ clause. 
period (.) 
To qualify a column name, precede the name of the column with the name of the table, followed by a(n) ____. 
IN 
To retrieve data from multiple tables in a query you can use the ____ operator with a subquery. 
EXISTS 
You can precede a subquery with the ____ operator to create a condition that is true if one or more rows are obtained...
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Data Management Foundation C175 WGU Questions and Answers with Verified Solutions
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Associative Entity - An associative entity is an element of the entity-relationship model. All 
relationships for the associative entity should be many. 
Attribute - An attribute is a property or characteristic of an entity. 
Binary relationship - A binary relationship is a relationship between two entity types. 
Candidate Key - Is any column or a combination of columns that can qualify as unique key in 
database. 
Cardinality - Cardinality represents the maximum number of entities that can be i...
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ICT3612 Assignment 3 2024 | Due 15 July 2024
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Question 1 (2 marks) 
Which of the following is an aggregate expression that will find the oldest date in the 
invoiceDate column? 
1. MIN(invoiceDate) 
2. MAX(invoiceDate) 
3. HIGH(invoiceDate) 
4. LOW(invoiceDate) 
Question 2 (2 marks) 
Which of the following LIMIT clauses will return a maximum of five rows starting with the eleventh 
row in the result set? 
 15 ICT3612/102/0/2024 
1. LIMIT 10, <= 5 
2. LIMIT 11, <= 5 
3. LIMIT 10, 5 
4. LIMIT 11, 5 
Question 3 (2 marks) 
When coded in a...
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